Token Ring

Product

Type

Max

Media

Port Count

PIMs/BRIMs

Management

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

STHI-22/24

stack base

SNMP

UTP

12/24

2 TPIMs

 

 

 

 

 

 

STHI-42/44

stack base

SNMP

STP

12/24

2 TPIMs

 

 

 

 

 

 

When examining the Media characteristics of the devices remaining in the selection field, the Network Designer immediately eliminates the STHI-42/44 from consideration. The network being designed will use UTP cabling, which is not directly supported by the STHI-42/44.

Product

Type

Max

Media

Port Count

PIMs/BRIMs

Management

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

STHI-22/24

stack base

SNMP

UTP

12/24

2 TPIMs

 

 

 

 

 

 

Examining the port count available from the STHI-22/24 devices, the Network Designer notes that even the STHI-24, which provides 24 station ports, will not meet the required station count of 45. As the STHI-24 supports the use of TPIMs for the creation of RI/RO connections, it would be possible to purchase a second STHI-24 and four TPIMs of a matching media type and connect the two devices through the RI/RO ports. This solution, while ideal in situations where users are widely dispersed or located in separate facilities, forces the Network Designer to purchase another intelligent device, and pay for the management capabilities twice. In this example, the use of the STHI-24’s stackable hub capabilities will provide a significant cost savings.

As the STHI-24 is a stack base, up to four STH non-intelligent hubs can be stacked on top of it and receive the STHI-24’s SNMP management functionality.

8-6

Token Ring Workgroup Design

Page 104
Image 104
Cabletron Systems switches, bridges manual Snmp UTP